I struggled for quite a few hours trying to get the imapd and lmtpd
daemons running. They always ended with a segment fault before coming up.
After trying to track down the issue, it seems like the pid-files for
the daemons cannot be created in /var/run with the nobody:nogroup
privileges. When I created the directory /var/run/dbmail, with
nobody:nogroup ownership, and started both daemons with the parameter -p
and explicitly assigned the full path to the pid-files in
/var/run/dbmail, everything worked OK.
I'm replacing an older DBMail 2.2.16 installation, and there is no
issue with that, the pid-files and state-files owned by root:root, but
under 3.0.0, they are owned by nobody:nogroup.
I've not seen it in the documentation, maybe it should be mentioned, as
it saves lots of troubleshooting.
OS: Slackware 13.37 x86_64 (same problem under two different installations)